Verfahren zur Herstellung eines Einsatz-Rueckschlagventils und danach hergestelltes Rueckschlagventil

摘要

The invention relates to a one-way valve and to a method for manufacturing a one-way valve. The method involves drawing a cup-shaped housing from sheet metal in several stages and punching a valve seat in the bottom of the cup. A shoulder is formed in the housing by means of a profiled drawing mandrel and by fitting a washer against the shoulder to serve as a backing member for a tapered spring.